Angle diamond grinding wheel

ABSTRACT

This novel invention consists of a diamond grinding wheel having its cutting surface formed at a predetermined angle in relation to the spindle supporting and rotating the aforesaid wheel on a grinding machine. The grinding wheel is bonded to a ring that is secured by a plurality of headless screws to a circular mounting flange that is fastened to the aforesaid spindle of the grinder.

United States Patent 1191 Geonnotti ANGLE DIAMOND GRINDING WHEEL [76] Inventor: Anthony R. Geonnotti, 1500 Bridgewater Rd., Cornwells Heights, Pa. 19020 [22] Filed: Feb. 16, 1973 [21] App]. No.: 332,921

52 U.s. c1 51/71; 51/98 R; 51/105 R; 51/204 [51] Int. Cl B24b 7/10; B24b 19/00; 324d 7/18 [58] Field of Search 51/204, 209 R, 284, 124, 51/206 R, 98 R, 71, 98 BS, 105 R, 131, 288, 108 R [56] References Cited UNITED STATES PATENTS 1,828,663 10/1931 .lopp 51/209 R 2,145,888 2/1939 Moulton 2,181,285 11/1939 Schuler.... 2,358,460 9/1944 Kelleher... 2,496,352 2/1950 Metzgcr... 2,813,379 11/1957 Trottieri... 2,826,877 3/1958 Lau 51/209 R X OTHER PUBLICATIONS Accurate Diamond Tool Corp., Diamond Wheel Catalog, Sept. 1972, p. 15.

Primary ExaminerD0nald G. Kelly Attorney, Agent, or Firm-Paul & Paul [5 7] ABSTRACT This novel invention consists of a diamond grinding wheel having its cutting surface formed at a predetermined angle in relation to the spindle supporting and rotating the aforesaid wheel on a grinding machine. The grinding wheel is bonded to a ring that is secured by a plurality of headless screws to a circular mounting flange that is fastened to the aforesaid spindle of the grinder.

4 Claims, 3 Drawing Figures ANGLE DIAMOND GRINDING WHEEL This invention relates to grinding wheels; more particularly, to that type of grinding wheels known in the art as diamond grinding wheels; still more particularly, to diamond grinding wheels used on a grinder for the grinding of carbide inserts.

For the benefit of those having limited or no experience in the art of grinding carbide inserts, it is herein explained that diamond grinding wheels are defined in machinist dictionaries as grinding wheels in which the abrasive is a layer of small particles of diamonds held to the wheel in a suitable bond. Carbide inserts are defined in the same dictionaries as molded sintered carbide pieces to be clamped to tool holders or shanks, for performing various machining operations. Carbide inserts are made in various shapes.

Two types of grinding wheels are at present used for the grinding of carbide inserts. These are the periphery wheel and the face grinding wheel. Both of these grinding wheels have certain herein described disadvantages.

The use of the aforesaid periphery wheel makes it difficult to produce an insert without a convex or a concave condition. Then too, the wheel is not able to stand a heavy in-feed rate because of line contact of work piece, and the very slow rate of metal removal.

The use of the aforesaid face grinding wheel results in grind lines almost perpendicular to the grind lines on the top and bottom surface of the insert, therefore causing a ragged edge on the insert that is ground with this type of wheel.

It is therefore the principal object of this invention to provide an angle diamond grinding wheel that will eliminate all of the above noted disadvantages of both the aforesaid periphery and the face grinding wheels.

Another object of this invention is to provide an angle diamond grinding wheel that virtually eliminates the concave or convex problem because the grinding is done on an ellipse which actually produces the radius of a wheel.

Still another object of this invention is to provide an angle diamond grinding wheel of the character herein described that allows a faster rate of removal of the metal as well as permitting the keeping of the grind lines parallel to the top and bottom surfaces of the inserts.

Other and further objects and advantages of this invention will no doubt appear as the reading of this specification and its appended claims proceeds and the accompanying drawing is examined in connection therewith.

In the drawing:

FIG. 1 is a top view of this invention mounted on a grinder showing the relation of the invention to the carbide insert it is to grind. Only a portion of the grinder and the holder and locator holding the insert are shown and this is in phantom lines for reasons of clarity. The grinding wheel is shown in cross section for the reason also of clarity.

FIG. 2 is a front view of this invention.

FIG. 3 is a sectional view of this invention, taken substantially along line 3-3 of FIG. 2, and viewed in the direction indicated by the arrows.

In the several views of this invention, like parts of the grinding wheel are indicated by like reference numbers. The reference number 5 indicates this invention in its entirety.

Directing ones attention first to FIG. 1 of the accompanying drawing it will be seen that this invention consists of a circular mounting flange 6 having a ring 7 that is basically triangular when viewed in cross section.

The aforesaid ring 7 is secured to the aforesaid circular mounting flange 6 by means of a plurality of equally spaced headless screws 8. A diamond wheel 9, that is rectangular in cross section, is suitably secured to the face of the aforesaid ring 7.

Continuing to look at FIG. 1 of the drawing it will be seen that the aforesaid grinding wheel 5 is suitably secured to the spindle 10 which is part of the grinder. The previously-mentioned carbide insert holder isindicated by the reference number 11 while the carbide insert is indicated by the reference number 12.

Still looking at FIG. 1 of the drawing it will be seen that the aforesaid diamond wheel 9 is at a 25 angle to the plane defined by the wheel 9. This angle is just a typical angle which can be anything from say 15 to 55 as required by the specific application of this invention.

Examination of the accompanying drawing so fully illustrates the use of this invention that no written explanation of the same is considered to be necessary in this specification.

This invention is subject to any and all changes in detail design, construction, and or modifications that one may care to make in so long as the changes and or modifications all fall within the scope and intent of the appended claims.

I claim:

I. Apparatus for grinding an outer surface of carbide inserts to a specified configuration, comprising:

locator means for positioning inserts along a speci fied axis with said outer surface exposed at a predetermined orientation for grinding; and

a grinding wheel including a frustoconical flange portion having a shaft mount at a central location and a protuberance about the outer periphery of said flange, said protuberance having a generally triangular cross section tapering away from said outer periphery coaxially with said shaft, thereby defining outer and inner annular surfaces situated at predetermined acute angles to the plane of said outer periphery, the outer of said annular surfaces being formed with diamond abrasive surface to constitute a work surface, the angle of said outer annular surface to the plane of said outer periphery being in the range 15 to 55;

said wheel rotating in a plane intersecting said axis at said angle of said outer annular surface to the plane of said outer periphery.

2. A wheel for grinding carbide inserts comprising a frustoconical flange portion having a shaft mount at a central location and a protuberance about the outer periphery of said flange, said protuberance having a generally triangular cross section tapering away from said outer periphery coaxially with said shaft, thereby defining outer and inner annular surfaces situated at predetermined acute angles to the plane of said outer periphery, the outer of said annular surfaces being formed with diamond abrasive material to constitute a work surface, the angle of said outer annular surface to the plane of said outer periphery being in the range of 15 to 55.

3. The wheel of claim 2 wherein said angle of said outer annular surface is substantially 25.

4. A wheel as described in claim 1 wherein said working surface is inclined from the plane of said annulus at substantially a 25 angle. 

1. Apparatus for grinding an outer surface of carbide inserts to a specified configuration, comprising: locator means for positioning inserts along a specified axis with said outer surface exposed at a predetermined orientation for grinding; and a grinding wheel including a frustoconical flange portion having a shaft mount at a central location and a protuberance about the outer periphery of said flange, said protuberance having a generally triangular cross section tapering away from said outer periphery coaxially with said shaft, thereby defining outer and inner annular surfaces situated at predetermined acute angles to the plane of said outer periphery, the outer of said annular surfaces being formed with diamond abrasive surface to constitute a work surface, the angle of said outer annular surface to the plane of said outer periphery being in the range 15* to 55*; said wheel rotating in a plane intersecting said axis at said angle of said outer annular surface to the plane of said outer periphery.
 2. A wheel for grinding carbide inserts comprising a frustoconical flange portion having a shaft mount at a central location and a protuberance about the outer periphery of said flange, said protuberance having a generally triangular cross section tapering away from said outer periphery coaxially with said shaft, thereby defining outer and inner annular surfaces situated at predetermined acute angles to the plane of said outer periphery, the outer of said annular surfaces being formed with diamond abrasive material to constitute a work surface, the angle of said outer annular surface to the plane of said outer periphery being in the range of 15* to 55*.
 3. The wheel of claim 2 wherein said anglE of said outer annular surface is substantially 25*.
 4. A wheel as described in claim 1 wherein said working surface is inclined from the plane of said annulus at substantially a 25* angle. 